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(Model.) 4 SheetsSheet 1.

A. E. G. LUBKEQ DYNAMO ELECTRIC MACHINE.

Pagented Feb. 19, 1884.

(ModeL) 4 SheetsSheet 3.

A. E. G. LUBKE.

DYNAMO ELECTRIC MACHINE.

Patented Feb. 19, 1884.

0 7% ofw a ,g U/ QQZ/MZ Mg 4 Sheets-Sheet 4.

(Model.)

A. B. G. LUBKE.

DYNAMO ELECTRIC MACHINE.

No. 293,758. Patented Feb. 19, 1884.

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UNITE STATES.

Farawr @rrrca ADOLPH E. GUSTAV LUBKE, OF NElV YORK, F. Y.

DYNAEVlG-ELECTRIC MACl-HNE' SPECIFICATION forming part of Letters Patent No. 293,758, dated February 19, 1884:.

7 Application lilcd November 12, 1883. (Model) To a whom it may concern:

Be it known that I, Anorrn: E. GUSTAV LUBKE, of the city and State of New York, have invented an Improvement in Dynamo- Electric Machines, of which the following is a specification.

This machine is based upon the well-known fact that a disk revolved in front of magnetic poles, or a cylinder revolved around such poles, has a current set up therein.

My present invention relates to the peculiar construction of the magnet wherein the opposite poles are brought close together, and the revolving portion, either in the form of a'cylinder or of combined cylinder and disk, passes between the poles and cuts the magnetic field in such a manner as to set up powerful elec. tric currents.

In the drawings, Figure l is a plan partially in section. Fig. 2 is an end View, partially in section, of the present improvement, with cylindrical sections revolved between the poles. Fig. 3 is a vertical longitudinal section. Fig. 4 is a crosssection of the improvement, with induction-plates and cylinders similar to a hollow wheel. Fig. 5 represents two such wheels and magnets. Fig. 6 is a vertical section; and Fig. 7 is a crosssection, with the induction-plates as loops passing around the field-magnet poles. Figs. 8, 9, 10, and 11 show modifications in the polefaces of the fieldmagnets.

The poles of the field-magnets are marked N S, respectively, the helices through which the electric current passes are marked, re-

- spectively, N, for the north poles, and S for the south poles. The strips or cylinders of copper that pass between the poles are marked '0, the shaft that is revolved by power is marked D, and the disk or wheel to which the strips or cylinders of copper are attached is marked E.

In Figs. 1 and 2 the poles S S are segments of cylinders extending from the cores S around which the helices S are wound. The poles N N are tubular, and face each other, having between them the wheel E, and these tubular poles N extend to the end cores, N", around which the helices N are wound. B B are the back bars connecting S with N It is to be understood that the current is passed through the helices N and S in such a direction that the poles S will be magnetized by induction from the cores S", and that the cylinders N, forming the other poles, will be magnetized by induction from the cores N which cores also form cross-bars, one at each end of the frame that contains also the back bars, B, ofthe magnets. These parts are represented as secured together by screws but they may be made in any desired manner. v

In Fig. 1 one half of the machine to theleft of the vertical central dotted line is in section, the other half to the right of that line is in elevation. So, also, the lower half of Fig. 2 is in section, and the upper half in elevation.

The copper portion 0 is composed of six sections of acylinder. Two of them (marked 3 3) are connected at their ends to the rings a 4. Two others (marked 5) are connected at their ends to the rings 6, and the other two (marked 7) are connected at their ends to the rings 8 8. These rings are insulated by not touching each other or the respective copper sections, except at the ends where they are in metallic contact with their respective sections.

Around the tubular stem of the poles X there are six stationary rings, three at each end. They are inside of the respective rings 4 4, 6 G, and S 8, and are marked, respectively, 41, (31, and 81. These rings are insulated from each other and from the poles N by layers of paper, vulcanite, or other suitable material, and each ring has attached to it a tongue, a, which extends along in a groove to its bindingpost b or Z). The post and tongue are insulated from the cylindrical stem of the pole N, and from the cross-bar core N. There are one or more brushes, (1, upon each of the rings at 4. 6 6 8 S, with their inner ends passing through slots in such rings, and bearing upon the respective stationary rings ll 61 81 below, so as to insure perfect contact.

It will now be understood that the respect ive copper sections 0 are carried around by the wheel E, to the periphery of which the center portions of such copper sections are screwed, and that said sections 0 pass around the pole N and inside the cylindrical segments formingthe poles S, and in so doing they cut the lines of magnetism, and electric currents are set up in one direction, continuously and uniformly, in the said copper sections 0, and the rings 4: 6 8 revolve with these sections around the stationary rings 41 61 81, and the l brushes maintain electric contact; hence the current will enter the binding-posts b at one end and pass out by the binding-posts b at the other end, and thence either through the field-helices or to outside circuits. The stationary field-magnet helices may be energized by a current set up in the machine or brought from some other machine. I also remark that the magnet-poles may be reversed, the north poles being those marked S, and the south poles those marked N. Referring to Figs. 3 and 4, it will be seen that the helices and cores are arranged in circles at opposite sides of the revolving copper portion 0, and that said copper portions are composed of the cylinders 4 4, with strips 3, in a U form, passing from one cylinder to the next, and forming a hollow armature cage or drum that is connected upon the periphery of the disk Ewhich receivesits motion from the shaft D, and apulley, to which suitable power is applied. Each magnet has a pole-face, S, that projects at 10 over the edge of the armature-drum, and a flat pole-face may be of sectoral shape, as seen in Fig. 4. The cores S are connected at their backends with a frame or back bars, B, extending to the central hollow cylinders, N, upon which are the ring-shaped pole-plates N, that are within the armature-drum of copper plates 0; hence the poles N are stationary and near to the poles S of the circular range of magnets and helices S, and the copper plates pass between the pole-faces N and S and cutthe lines of magnetism as such armature-drum is re volved..

I remark that the poles N will be magnetized by induction from the cores 8*, through the back bars or frameB and the cylinder N. The current may circulate through the insulated stationary brushes cl, that 'are connected to the outside circuit and bear at their inner ends upon the cylindrical or ring portions 4 of the armature-cage; or else the stocks of the brushes may be fastened to the cylindrical portions 4, and the ends of the brushes pass through holes in the said cylinders 4, and bear at their ends upon the stationary insulated rings 41, to which the circuit-wires are connected, as in Fig. 1. In this mode of construction I am able to employ an armature-wheel of greater diameter than that in Fig. 1, and one that is not liable'to be distorted by the centrifugal action, because the disk or wheel E and the copper bars Care firmly united and form the central portion of the armature-cage.

In Fig. 5 the same kind of armature-cage is shown, and there are two of them on one shaft, the field-magnets being duplicated and arranged with the back bars or frames back to back. There may be more than twoof these machines placed together, the whole of the armature-cages being upon one shaft. The circuit-connections are to be made to each separate cage, or the cages may be successively connected together. For instance, the circuitconnections to the armature-cagemaybe such as shown in Figs. 1 and 2,with wires taken off to the field-helices or to separate outside circuits; or the same thing may be done with circuit-connections to the armature-cage, such as in Fig. 3; or the separate armature-connections may be made by wires in which those of the same polarity are brought together for currents of quantity. I have, however, shown the two sets of rings 41 and 61 and 4 and 6 similar to those in Fig. 1, the ends of the armature-plate 0 being connected to said rings 4 and 6, respectively, and with the tongues a a, extending to the bindingposts b 1), similar to those in the said Fig. 1, and the tongues, a connecting from the ring 41 in one section to the similar ring in the next section, and the tongue (6, connecting from the rings 61 in one section to the similar ring in the next section, so that the current will circulate through the entire range of armature-cages from one end of the machine to the other; or the connections may be in any desired manner to produce electriccurrents of intensity or quantity.

In Figs. 6 and 7 a single machine is shown, that is constructed in a similar manner to the sections of the machine in Fig. 5; and thisv serves to more fully represent some of the details of the parts in such machine. I however have shown,in addition,the brushes for insuring metallic contact between the respective rings. Upon reference to Figs. 6 and 7, it will be seen that the rings, their brushes, and the connections are identically the same as those in Figs. 1 and 2, except that there are only two pairs of rings,4 41 and 6 G1, on each side of the armature-wheel, instead of three pairs, as in Figs. 1 and 2; and that there are twelve copper plates forming the armaturecage,instead of six, and the armature-wheel E and pole-facesNSare the same as those shown in Figs. 3 and 4. i

The field-magnets and cores, Figs. 3 and 4, are elliptical, and the pole-faces are trapezoidal; and I prefer that the field-magnets in one circular range shall be in line with the space between the magnets in the other circular range, so that the magnetic action may be more uniformly distributed entirely around the revolving armature.-

The armature-cage, Figs. 3 and 4, is represented as a hollow ring, with triangular openings cut through its edges, so as to form there by the bars of the armature. The rings or cylinders 4 4 are formed with or fastened to the inner edges of this hollow rin The operations of the parts are the same as hereinbefore described, and do not require to be repeated.

I have shown some of the different ways in which my invention may be embodied, and remark that these machines are made with reference to supplying the different demands that may-arise for currents adapted to plating, and to arc-lamps and incandescent lamps, telegraphy, 85c.

In some of the figures the pole-faces, cores, and back bars or frames are represented as screwed together, and in other instances as separate. The mode of making these parts immaterial.- In Fig. Sthe pole-faces are shown as U-shaped, with the other poles between them, and the strips bent in a zigzag shape and secured to the edges of the disk E, as before. In Fi 9 the same parts are shown; but in this case the disk E may be made of iron, as it will become magnetized by induction, the polarity being, as represented, N S, respectively. In Figs. 10 and 11 the pole-faces are of different shapes from those shown in the other figures, the other parts being the same as before described, and operating in the same manner.

I claim as my invention 1. The external electro magnets, having pole-faces S, the internal poles, N, and back bars or frames connecting the cores and poles, in combination with the shaft D, passing through the tubular portion of the pole N, the armature-wheel E between the adjacent polefaces N, and the armature-cage 0, connected to the edge of the wheel E, and passing between the pole-faces N S, substantially as set forth.

2. The field-magnets and polefaces N S, ar-

ranged substantially as described, in combination with the central shaft, D, to which power is applied to rotate the same, the disk E, the armature-cage composed of metal plates connected at the edge of the disk E and passing'between the polefaces N S, the rings L 6, connecting the plates of the armature-cage, the" insulated rings 41 61, and circuit-connections, substantially as set forth.

8. The field-magnets and pole-faces N S, arranged substantially as described, in combinat-ion with the central shaft, D, to which power is applied to rotate the same, the armatare-disk E upon such shaft, the cage 0, connected to the edge thereof, and passing between the pole-faces, the rings connecting the end portions of the armature-cage, and brushes applied to maintain metallic contact between the revolving and stationary parts, substan tially as set forth.

Signed by me this 17th day of September, A. D. 1883,

ADOLPH E. GUSTAV LUBKE.

Witnesses:

Gno. T. PINCKNEY, WILLIAM G. Morn 

